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Reimplement FieldEq with FieldPredicate

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This commit is contained in:
Matthias Beyer 2016-03-12 14:57:29 +01:00
parent c76d654f9b
commit f86a8968a4
1 changed files with 17 additions and 8 deletions
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25
libimagentryfilter/src/builtin/header/field_eq.rs
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@ -1,22 +1,34 @@
use libimagstore::store::Entry;
use builtin::header::field_path::FieldPath;
use builtin::header::field_predicate::FieldPredicate;
use builtin::header::field_predicate::Predicate;
use filter::Filter;
use toml::Value;
struct EqPred {
expected: Value
}
impl Predicate for EqPred {
fn evaluate(&self, v: Value) -> bool {
self.expected == v
}
}
/// Check whether certain header field in a entry is equal to a value
pub struct FieldEq {
header_field_path: FieldPath,
expected_value: Value
filter: FieldPredicate<EqPred>,
}
impl FieldEq {
pub fn new(path: FieldPath, expected_value: Value) -> FieldEq {
FieldEq {
header_field_path: path,
expected_value: expected_value,
filter: FieldPredicate::new(path, Box::new(EqPred { expected: expected_value })),
}
}
@ -25,10 +37,7 @@ impl FieldEq {
impl Filter for FieldEq {
fn filter(&self, e: &Entry) -> bool {
e.get_header()
.read(&self.header_field_path[..])
.map(|val| val.map(|v| v == self.expected_value).unwrap_or(false))
.unwrap_or(false)
self.filter.filter(e)
}
}